Two hand control



"'16, 1943- w. F. GAYRING TWO HAND CONTROL Filed-July 26, 1941 3Sheets-Sheet. 1 t

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INVENTOR. ma GAYRIN why/047 IATTOR s.-

Mafch 16, 1943. F. GA YRING 2,313,869

" TWO HAND CONTROL Filed July 26, -1941 s s'hei s sheet 2 IN VEN TOR.

March 16, 1943. w. F; GAYRING I 2,313,869

" TWO HAND CONTROL Filed July 26, 1941 3 Sheets-Sheet 3 I INVENTOR.w.'|=.eAvmu W d I ATTORN ls.

"the manually operated Patented Mar. 16, 1943 UNITED "PATENT FF! CE TVQHAND CONTROL Wallace .Gayring Minoah N. Y., .assignor .to The ProsperityCompany; Incl, Syracuse, N. Y., a

con oration of New York I Application July 25, 1941: SBIiaLND. 404,221

9 Claims. 21. 192 -131) This .in'ventionrelates to two hand controls forcontrolling the operation of a machine, which has an operationdangerousto the operator, as power presses, punch presses, garment and laundrypresses, and the like.

The invention has for its object a two hand ,controlin whichsubstantially simultaneous operation of both manuals is required and inwhich the operation of each manual operates means which controls theeffective operation of the other manual, so that the operation of bothmanuals is required substantially simultaneously and the operation ofeach manual makes theother manual efiective, or in other words, eithermanual cannot be effectively operated unless the other manual is alsooperated simultaneously, and upon the operation of both manualssubstantially simultaneously, each manual makes the other effective.

,The invention consists in the novel features and in the combinationsand constructions herein after set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure l is a diagrammatic view of this two hand control and the powermembers which the manuals operate.

Figure 2 is an enlarged sectional view through mechanism and the powercontrol member,

Figure 3v is a sectional view similar to Figure 1 on a reduced scaleshowing, the eflective operation of one manual when theotherissimultaneously operated.

Figure 4. is a view similar ,to Figure 3 showing theinei fectiveoperation of one manual when the other manualis not operatedsimultaneously.

Figure 5 is an elevation of one of the couplings and contiguous parts.

This two hand control comprises, in its general. aspect, a pair ofcontrol elements for con trolling the flow of power, these elementsbeing here shown as valves for controlling the flow of air, each elementincluding a self-returnable shiftable member, that is, in theillustrated embodiment, a spring-pressed valve member, both of whichshiftable members must be operated substantiallysimultaneously to effectthe flow of air through the power line, apair cimanuals includingoperating parts, andmembers operated thereby, and paired respectivelywith the shiftable members of the control elementsor valves,

and means operated by either operating part for controlling theoperation of the shiftable control member operated by the otheroperating part.

In the illustrated embodiment of the invention, this means consists ofcouplings between the members operated by the operating parts andthemovable members of the control elements, the couplings being normallyout of operative or coupling position and the coupling associated orpaired with each control element and its manual being operated intoeifective or coupling position by the operation of the other manual.

I and 2 designate, respectively, the control elements for controllingthe flow of power to a motor or machine to which the two hand control isapplied. The motor may be of any type and the control elements I, 2 arehere shown as valves for controlling the flow of pressure fluid, ascompressed air, to a cylinder and piston motor not shown. Each controlmember comprises a valve casing}! or 4, a movable member 5 or 6 thereinhaving a normally closed intake valve head 1 and a normallylopen exhaustvalve head 8. The valve member 5 or 6 is self-closingor held in itsnormal. position in which the intake valve head 1 is. closedby asuitable spring I I. The two valves or controlmembers I, 2 are connectedin series in a power line. .One of the valve casings, as 4, isconnectedto the main supply pipe I2. The valve casings are connected together bya pipe I3, and the valve casing, as 3, is connected by a pipe I4 to thepneumatic motor of the machine to which the two hand control is applied.When both movable members 5, E are operated to open the intake valveheads and close the exhaust valve heads, obviously the air will passfrom the main pipe I2 to the valve casing 4, past the open intake valvehead 8 through pipe I3 to valve casing 3, past the open intake valvehead 1 thereof and through the pipe I4 to the pneumatic motor of. themachine to which the two hand control is applied. When the valves arereleased, the springs .II return them to their normal positions, so thatthe air can exhaust back from the pneumatic motor throughthe pipe I4,valve casing 3 and past the open intake valve head. 9 through theexhaustoutlet I5 to the outer air. The valve casing, 4 has a similar exhaustoutlet I6. When only one valve is operated, as will be hereinafterdescribed, for instance, assume that the valve control member 2 only isoperated, then the air will pass from pipe 42 through the valve casingpipe I3 where the air will be stopped, because the intakevalvehead I isclosed, If the control member. or valve I only is operated, the air fromthe main line I2 will not now, because of the intake The'movable membersl9 and uals l7, l8 have stems 43 and alined with paired with the controlmembers I, 2. Each includes a movable member l9 or 29 paired with theshiftable element or valve 5 or 6, an operating part 2|, 22 having afinger-piece 23 or 24, these parts and members 2|, I9; 22, be-

ing operable relatively to each other, and means operable by therelative movement of the operating part 2| or 22 relative to the movablemember |9 or2|| for controlling the operation of the other valve member5 or 6 controlled by the other operating part 2| or 22. In other words,the operation of the operating part 2| by its finger-piece 23 controlsthe operation of the valve member 6 by the other operating part 22, andlikewise the operation of the operating part 22 controls the operationof the valve 5 by the operating part 2|. The operating part 2| or 22 andthe movable member H! or 29 are shown as in the nature of pistonslocated in a cylinder 25 or 26 and spaced aparttherein.- The space 21between-the members 2| and |9 of the manual I7 is connected by a pipe 29to means pressure operated, as a diaphragm chamber 34 having a diaphragm3| therein, which operates a coupling member, to be presently described,and the space 28 between the operating part 22 and. movable member 29 ofthe --manual l8 is connected bya pipe '35 to a similar diaphragm chamber39 having a diaphragm 37 coacting with a coupling member. The movementof the operating part 2| or 22 relative to the member 19 or 20 isagainst the action of a returning spring 39 interposed between them andthe shifting movement of the movable member |9 or 2|] is being actedupon by returning springs as 51. The coupling heads 53, 54 are slidablymounted in the stems 55, 56 and the sliding movement is resisted bybufier springs 59, 69. Each of the diaphragm chambers 35, 37 is providedwith a suitable bleeder or breather valve 6|, 62.

In operation, upon the depression of both finger-pieces 23, 24, bothvalves 45, will be closed, and theo'perating members 2|, 22 'm'oveddownwardly compressing the'airin both spaces 27, 28, thus causing boththe diaphragms 33, 34 to be actuated to move the couplings 53, 54 intothe spaces between the stems 49 and 59 and plungers 5|, 52. Thismovement compresses the springs 39,- and continuedmovement causes themembers |9, 29 to be depressed against the returning springs, and hencetransmit motion to the valves 3, 4 to open them and permit the flow I ofpower through the pipe M to the pneumatic against the action of areturning spring 4|, this spring being stronger than the spring 39., Thefinger-piece 23 or 24 is movable relatively to its correspondingoperating part 2| or 22 against the action of a returning spring 43. Thefingerpiece 23 or 24 is provided. with a normally open valve headcontrolling an axial passage 41 through the member 2| or 22 to the space21 or This valve head 45 is normally held open 1 by the spring 43; Whenthe finger-piece 23 or 24 is operated or depressed, it closes the valve45 so that the air in the space 27 or 28 is compressed. As soon as theoperator releases the finger-pieces 23, 24, the valve 45 opens,permitting the air to escape from the space 21 or 28. The constructionof these, manuals H, H! per se forms no part of this invention. Y V

20 of the manthe movable. valve members 5, 6 or with plungers 5|, 52slidable in-the valve casings 3, '4 and thrusting against the exhaustvalve heads 9', of the valve'members 5, 6. The outerend of the plunger5| or 52 or the movable member 5, 6

is spaced apart from the end of the stem 49 or 59.

53 and 54 designate the couplings, these being normally out of spacesbetween the stems 49, '50 and the members 5, 6, and inorder to effectthe operation of the valves 3, 4, must be shifted into such space.Thesecoupling membars are shown as heads carried by stems 55, 55

slidably mounted in'the diaphragm chambers 36, 37 on the non-pressuresides thereof and thrusting against the diaphragms:33 or 34, they therelease of the finger-pieces, the air exhausts V back from the diaphragmchambers, thus causing the couplings 53, 54 to be moved out of theiroperative position by'the springs 57. If only one finger-piece isoperated, as for instance the finger-piece 23, the stem 49 of thecorresponding movable member will only idle in the space be tween thestem 49 and the corresponding plunger 5! of the control valve 3, and thecontrol valve 3 will not be opened, but the coupling 54 of the othermanual |8 operated by the fingerpiece 24 will be shifted into operativeposition. However, as before explained, the operation of only one manualis of no avail, as only one control valve is opened; Upon the operationof the finger-piece-24 only,-the stem 50 of the movable operation andpermit either manual to be operated a split second after the other, moreor less lost motion may be provided between the stem 49 or 53 andthe-coupling 53 or 54 or between the coupling 53, 54 and the members 5,6.

The two hand control here shown is particularly adaptedfor punch pressesand the like of the type. operated by a lever or pedal. For the generaltype of such punch press, see Patent'No.

1,397,779, issued November 22, 1921. For the general construction-of themanual shown herein, see Davis Patent No. 2,016,136, issued October 1,1935.

What I claim is:

1. A two hand control including a pair of con trol elements forcontrolling the flow of power, each including a self-returnableshiftable" member, both of which must be operated substantiallysimultaneously, a pair of manuals'including operating parts and membersoperated respectively thereby and paired respectively with the shiftablemembers of the control elements, and means operated by either operatingpart for controlling the operation of the shiftable control membercontrolled by the other manually operated part.

2. A two hand control including a pair of control elements forcontrolling the flow of power, each including aself-returnable,shiftablemam,-

ber, both of which must be operated substantially simultaneously, a pairof manuals including operating parts and members operated respectivelythereby and paired respectively with the shiftable members of thecontrol elements, means operated by either operating part forcontrolling the operation of the shiftable control member controlled bythe other manually operated part, said means including a coupling, onefor each manually operated member shiftable into and out of a positionbetween each manually operated member and the movable member of thecompanion power control element and normally out of coupling position,and means operated by the operation of each manually operated part formoving the coupling .into operative position.

3. A two hand control including a pair of control elements forcontrolling the flow of power, each including a self-returnableshiftable member, both of which must be operated substantiallysimultaneously, a pair of manuals including operating parts and membersoperated respectively thereby and paired respectively with the shiftablemembers of the control elements, and means operated by either operatingpart for controlling the operation of the shiftable control membercontrolled by the other manually operated part, said means comprising ahead for each manually operated member operated by the former parts andnormally out of co-operative position relative thereto and movable intoco-operative relation therewith by the operation of the other part.

4. A two hand control including a pair of elements for controlling theflow of power and connected in series in a power line, each including ashiftable member, both of which must be operated substantiallysimultaneously to effect the flow of power through the power line, apair of manually operated parts operable to create air pressure, membersoperated by said parts respectively and paired respectively with theshiftable members of the control elements, and means operated by the airpressure created by one manually operated part for controlling theoperation of the shiftable control member operated by the other manuallyoperated part.

5. A two hand control including a pair of elements for controlling theflow of power and connected in series in a power line, each including ashiftable member, both of which must be operated substantiallysimultaneously to efiect the flow of power through the power line, apair of manually operated parts operable to create air pressure, membersoperated by said parts respectively and paired respectively with theshiftable members of the control elements, and means operated by the airpressure created by one manually operated part for controlling theoperation of the shiftable control member operated by the other manuallyoperated part, said means com-' prising heads for co-aoting respectivelywith the manually operated part and normally out of position to co-acttherewith, and each movable into co-action with its companion manuallyoperated member upon the operation of the other manually operatedmember.

6. A two hand control including a pair of elements for controlling theflow of power and connected in series in a power line, each including aself-returnable shiftable member, both of which must be operatedsubstantially simultaneously to effect the How of power through thepower line, a pair of self-returnable, manually operable parts,self-returnable members operated by said parts respectively and pairedrespectively with the shiftable members of the control elements, saidparts being operable to create pressure between them and the membersoperated thereby, and means operated by the air pressure created by onepart for controlling the operation of the shiftable control memberoperated by the other member, said means comprising a coupling movableinto position between each member and its companion control member andnormally out of such position and shiftable by the air pressure intosuch position.

7. A two hand control including a pair of elements for controlling theflow of power and connected in series in a power line, each including aself-returnable shiftable member, both of which must be operatedsubstantially simultaneously to effect the flow of power through thepower line, a pair of self-returnable, manually operable parts,self-returnable members operated by said parts respectively, and pairedrespectively with the shiftable members of the control elements, saidparts being operable to create pressure between them and the membersoperated thereby, said parts having means operable to release the airpressure when the-parts are released, and means operated by the airpressure created by one part for controlling the operation of theshiftable control member operated by the other manually operated member,said means comprising a coupling movable into position between eachmember and its companion control member and normally out of suchposition and shiftable by the air pressure into such position.

8. A two hand control including a pair of manuals, a pair of controlmembers for a machine to which the two hand control is applied, operatedby the manuals respectively, both of which control members must beoperated to effect the operation of the machine, there being one controlmember for each manual, motion transmitting means between each manualand its companion control member, and means operated by the operation ofeither manual to control the effective operation of the other manual,whereby the op-- eration of both manuals in unison is required to effectthe operation of both control members.

9. A two hand control including a pair of manuals, a pair of controlmembers for a machine to which the two hand control is applied, operatedby the manuals respectively, both of which control members must beoperated to efiect the operation of the machine, there being one controlmember for each manual, motion transmitting means between each manualand its companion control member, each motion transmitting meansincluding a coupling normally out of coupling position and shiftableinto coupling position by the operation of the other manual.

WALLACE F. GAYRING.

